// Skia图形库服务实现 - 仅使用safe Rust

#![forbid(unsafe_code)]

use std::sync::Arc;
use std::sync::Mutex;
use std::collections::HashMap;
use log::{info, warn, error};

// 导入能力类型和错误类型
use super::{Capability, CapabilityId};
use super::gfx_service::{GraphicsService, GraphicsError};
use super::vulkan_service::{VulkanService, VulkanError, VkDevice, VkImage, VkSemaphore};

// Skia对象ID类型
pub type SkCanvas = u64;
pub type SkPaint = u64;
pub type SkPath = u64;
pub type SkBitmap = u64;
pub type SkImage = u64;
pub type SkSurface = u64;

// Skia颜色类型
pub type SkColor = u32;

// Skia错误类型
#[derive(Debug, Clone, PartialEq)]
pub enum SkiaError {
    InitializationFailed,
    InvalidHandle,
    GraphicsError(GraphicsError),
    VulkanError(VulkanError),
    InvalidParameter,
    OutOfMemory,
}

// Skia画布描述
pub struct SkCanvasDesc {
    pub width: u32,
    pub height: u32,
    pub color_type: u32,
    pub alpha_type: u32,
}

// Skia画笔样式
#[derive(Debug, Clone, Copy, PartialEq)]
pub enum SkPaintStyle {
    Fill = 0,
    Stroke = 1,
    StrokeAndFill = 2,
}

// Skia服务
pub struct SkiaService {
    graphics_service: Arc<Mutex<GraphicsService>>,
    vulkan_service: Arc<Mutex<VulkanService>>,
    canvases: HashMap<SkCanvas, SkiaCanvas>,
    paints: HashMap<SkPaint, SkiaPaint>,
    paths: HashMap<SkPath, SkiaPath>,
    bitmaps: HashMap<SkBitmap, SkiaBitmap>,
    images: HashMap<SkImage, SkiaImage>,
    surfaces: HashMap<SkSurface, SkiaSurface>,
    next_canvas_id: SkCanvas,
    next_paint_id: SkPaint,
    next_path_id: SkPath,
    next_bitmap_id: SkBitmap,
    next_image_id: SkImage,
    next_surface_id: SkSurface,
    mem_cap: Capability,
}

// Skia画布
pub struct SkiaCanvas {
    id: SkCanvas,
    width: u32,
    height: u32,
    surface_id: Option<SkSurface>,
}

// Skia画笔
pub struct SkiaPaint {
    id: SkPaint,
    color: SkColor,
    stroke_width: f32,
    style: SkPaintStyle,
    anti_alias: bool,
}

// Skia路径
pub struct SkiaPath {
    id: SkPath,
    // 路径数据将在实际实现中存储
}

// Skia位图
pub struct SkiaBitmap {
    id: SkBitmap,
    width: u32,
    height: u32,
    color_type: u32,
    pixels: Option<Vec<u8>>,
}

// Skia图像
pub struct SkiaImage {
    id: SkImage,
    width: u32,
    height: u32,
    bitmap_id: Option<SkBitmap>,
    vulkan_image_id: Option<VkImage>,
}

// Skia表面
pub struct SkiaSurface {
    id: SkSurface,
    width: u32,
    height: u32,
    color_type: u32,
    vulkan_image_id: VkImage,
    device_id: VkDevice,
}

impl SkiaService {
    // 创建新的Skia服务
    pub fn new(
        graphics_service: Arc<Mutex<GraphicsService>>,
        vulkan_service: Arc<Mutex<VulkanService>>,
        mem_cap: Capability
    ) -> Result<Self, String> {
        Ok(SkiaService {
            graphics_service,
            vulkan_service,
            canvases: HashMap::new(),
            paints: HashMap::new(),
            paths: HashMap::new(),
            bitmaps: HashMap::new(),
            images: HashMap::new(),
            surfaces: HashMap::new(),
            next_canvas_id: 1,
            next_paint_id: 1,
            next_path_id: 1,
            next_bitmap_id: 1,
            next_image_id: 1,
            next_surface_id: 1,
            mem_cap,
        })
    }

    // 启动Skia服务
    pub fn start(&mut self) -> Result<(), String> {
        info!("Skia service started successfully");
        Ok(())
    }

    // 创建渲染表面
    pub fn create_surface(
        &mut self,
        width: u32,
        height: u32,
        _vulkan_service: Arc<Mutex<VulkanService>>
    ) -> Result<u64, SkiaError> {
        let surface_id = self.next_surface_id;
        self.next_surface_id += 1;

        // 在这个简化实现中，我们不实际创建Vulkan表面
        // 只是记录表面尺寸和分配一个ID
        self.surfaces.insert(surface_id, SurfaceInfo {
            width,
            height,
            _surface: None,
        });

        info!("Created Skia surface: {} ({}x{})
", surface_id, width, height);
        Ok(surface_id)
    }

    // 销毁渲染表面
    pub fn destroy_surface(&mut self, surface_id: u64) -> Result<(), SkiaError> {
        if let Some(_surface_info) = self.surfaces.remove(&surface_id) {
            info!("Destroyed Skia surface: {}", surface_id);
            Ok(())
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 获取表面的画布
    pub fn get_surface_canvas(&mut self, surface_id: u64) -> Result<u64, SkiaError> {
        if !self.surfaces.contains_key(&surface_id) {
            return Err(SkiaError::InvalidHandle);
        }

        let canvas_id = self.next_canvas_id;
        self.next_canvas_id += 1;

        // 在这个简化实现中，我们不实际创建Skia画布
        // 只是记录画布和表面的关联
        self.canvases.insert(canvas_id, CanvasInfo {
            surface_id,
            canvas: None,
        });

        Ok(canvas_id)
    }

    // 清除画布
    pub fn clear(&mut self, canvas_id: SkCanvas, _color: SkColor) -> Result<(), SkiaError> {
        if let Some(_canvas) = self.canvases.get(&canvas_id) {
            // 在实际实现中，这里应该调用Skia API清空画布
            Ok(())
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 绘制矩形
    pub fn draw_rect(
        &mut self,
        canvas_id: SkCanvas,
        _left: f32,
        _top: f32,
        _right: f32,
        _bottom: f32,
        paint_id: SkPaint
    ) -> Result<(), SkiaError> {
        if let Some(_canvas) = self.canvases.get(&canvas_id) {
            if let Some(_paint) = self.paints.get(&paint_id) {
                // 在实际实现中，这里应该调用Skia API绘制矩形
                Ok(())
            } else {
                Err(SkiaError::InvalidHandle)
            }
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 创建画笔
    pub fn create_paint(&mut self) -> Result<SkPaint, SkiaError> {
        let paint_id = self.next_paint_id;
        self.next_paint_id += 1;

        let paint = SkiaPaint {
            id: paint_id,
            color: 0xFF000000, // 黑色
            stroke_width: 1.0,
            style: SkPaintStyle::Fill,
            anti_alias: true,
        };

        self.paints.insert(paint_id, paint);

        Ok(paint_id)
    }

    // 设置画笔颜色
    pub fn set_paint_color(&mut self, paint_id: SkPaint, color: SkColor) -> Result<(), SkiaError> {
        if let Some(paint) = self.paints.get_mut(&paint_id) {
            paint.color = color;
            Ok(())
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 设置画笔样式
    pub fn set_paint_style(
        &mut self,
        paint_id: SkPaint,
        style: SkPaintStyle
    ) -> Result<(), SkiaError> {
        if let Some(paint) = self.paints.get_mut(&paint_id) {
            paint.style = style;
            Ok(())
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 设置画笔线宽
    pub fn set_paint_stroke_width(
        &mut self,
        paint_id: SkPaint,
        width: f32
    ) -> Result<(), SkiaError> {
        if let Some(paint) = self.paints.get_mut(&paint_id) {
            paint.stroke_width = width;
            Ok(())
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 设置画笔抗锯齿
    pub fn set_paint_anti_alias(
        &mut self,
        paint_id: SkPaint,
        anti_alias: bool
    ) -> Result<(), SkiaError> {
        if let Some(paint) = self.paints.get_mut(&paint_id) {
            paint.anti_alias = anti_alias;
            Ok(())
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 销毁画笔
    pub fn destroy_paint(&mut self, paint_id: SkPaint) -> Result<(), SkiaError> {
        if self.paints.remove(&paint_id).is_some() {
            Ok(())
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 创建路径
    pub fn create_path(&mut self) -> Result<SkPath, SkiaError> {
        let path_id = self.next_path_id;
        self.next_path_id += 1;

        let path = SkiaPath {
            id: path_id,
        };

        self.paths.insert(path_id, path);

        Ok(path_id)
    }

    // 销毁路径
    pub fn destroy_path(&mut self, path_id: SkPath) -> Result<(), SkiaError> {
        if self.paths.remove(&path_id).is_some() {
            Ok(())
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 清空画布
    pub fn clear(&mut self, canvas_id: SkCanvas, _color: SkColor) -> Result<(), SkiaError> {
        if let Some(_canvas) = self.canvases.get(&canvas_id) {
            // 在实际实现中，这里应该调用Skia API清空画布
            Ok(())
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 绘制矩形
    pub fn draw_rect(
        &mut self,
        canvas_id: SkCanvas,
        _left: f32,
        _top: f32,
        _right: f32,
        _bottom: f32,
        paint_id: SkPaint
    ) -> Result<(), SkiaError> {
        if let Some(_canvas) = self.canvases.get(&canvas_id) {
            if let Some(_paint) = self.paints.get(&paint_id) {
                // 在实际实现中，这里应该调用Skia API绘制矩形
                Ok(())
            } else {
                Err(SkiaError::InvalidHandle)
            }
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 绘制圆形
    pub fn draw_circle(
        &mut self,
        canvas_id: SkCanvas,
        _cx: f32,
        _cy: f32,
        _radius: f32,
        paint_id: SkPaint
    ) -> Result<(), SkiaError> {
        if let Some(_canvas) = self.canvases.get(&canvas_id) {
            if let Some(_paint) = self.paints.get(&paint_id) {
                // 在实际实现中，这里应该调用Skia API绘制圆形
                Ok(())
            } else {
                Err(SkiaError::InvalidHandle)
            }
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 绘制文本
    pub fn draw_text(
        &mut self,
        canvas_id: SkCanvas,
        _text: &str,
        _x: f32,
        _y: f32,
        paint_id: SkPaint
    ) -> Result<(), SkiaError> {
        if let Some(_canvas) = self.canvases.get(&canvas_id) {
            if let Some(_paint) = self.paints.get(&paint_id) {
                // 在实际实现中，这里应该调用Skia API绘制文本
                Ok(())
            } else {
                Err(SkiaError::InvalidHandle)
            }
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 刷新表面
    pub fn flush_surface(
        &mut self,
        surface_id: SkSurface,
        _signal_semaphore: Option<VkSemaphore>
    ) -> Result<(), SkiaError> {
        if let Some(_surface) = self.surfaces.get(&surface_id) {
            // 在实际实现中，这里应该调用Skia API刷新表面
            // 并可能通过Vulkan服务提交命令缓冲区
            Ok(())
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 销毁画布
    pub fn destroy_canvas(&mut self, canvas_id: SkCanvas) -> Result<(), SkiaError> {
        if self.canvases.remove(&canvas_id).is_some() {
            Ok(())
        } else {
            Err(SkiaError::InvalidHandle)
        }
    }

    // 停止Skia服务
    pub fn stop(&mut self) -> Result<(), String> {
        // 清理所有资源
        self.canvases.clear();
        self.paints.clear();
        self.paths.clear();
        self.bitmaps.clear();
        self.images.clear();
        self.surfaces.clear();

        info!("Skia service stopped successfully");
        Ok(())
    }
}

impl Drop for SkiaService {
    fn drop(&mut self) {
        let _ = self.stop();
    }
}